Double Chest does not display custom name

How to reproduce

1. Rename a chest on an anvil, e.g. "Renamed".
2. Place the chest. When you open it the renamed name will be displayed as title, i.e. "Renamed".
3. Place any chest besides it, even a copy of itself, to make a double chest.
   → The double chest will have the title "Large Chest" when opened, not the custom name (i.e. "Renamed").

If you undo step 3 by removing the chest, reverting the double chest to a single chest, the single chest will again show the correct title i.e. "Renamed".